:root {
  --bg: #f3f6fb;
  --bg-strong: #e9eef8;
  --panel: rgba(255, 255, 255, 0.78);
  --panel-strong: rgba(255, 255, 255, 0.9);
  --panel-soft: rgba(244, 247, 252, 0.92);
  --text: #132238;
  --muted: #627189;
  --line: rgba(130, 149, 179, 0.2);
  --brand: #126a62;
  --brand-strong: #0d4f4a;
  --accent: #ff8f3d;
  --accent-soft: rgba(255, 143, 61, 0.14);
  --pill: rgba(19, 34, 56, 0.06);
  --shadow-lg: 0 24px 60px rgba(19, 34, 56, 0.12);
  --shadow-md: 0 14px 32px rgba(19, 34, 56, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(18, 106, 98, 0.08), transparent 30%),
    radial-gradient(circle at bottom right, rgba(255, 143, 61, 0.14), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, #f8fbff 100%);
  color: var(--text);
  font-family: "Segoe UI Variable Display", "Aptos", "Trebuchet MS", sans-serif;
  position: relative;
  overflow-x: hidden;
}

button,
input {
  font: inherit;
}

.bg-orb {
  position: fixed;
  border-radius: 999px;
  filter: blur(12px);
  pointer-events: none;
  z-index: 0;
}

.bg-orb-one {
  top: -5rem;
  right: -3rem;
  width: 16rem;
  height: 16rem;
  background: rgba(18, 106, 98, 0.16);
}

.bg-orb-two {
  left: -5rem;
  bottom: 8rem;
  width: 18rem;
  height: 18rem;
  background: rgba(255, 143, 61, 0.14);
}

.shell {
  position: relative;
  z-index: 1;
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 20px 16px 28px;
}

.screen {
  display: none;
}

.screen-active {
  display: block;
}

.hero {
  padding: 10px 4px 22px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand);
}

.kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
}

h1 {
  margin: 0;
  max-width: 11ch;
  font-size: clamp(2.4rem, 8vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.lead {
  margin: 16px 0 0;
  max-width: 52ch;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.65;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.hero-badge,
.meta-pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 700;
  backdrop-filter: blur(10px);
}

.panel,
.question-card,
.controls-card {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(14px);
}

.panel {
  padding: 20px;
}

.stack-lg > * + * {
  margin-top: 24px;
}

.stack-sm > * + * {
  margin-top: 12px;
}

.section-label,
.question-label,
.translation-label {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.language-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.language-option,
.level-option {
  position: relative;
}

.language-option input,
.level-option input {
  position: absolute;
  opacity: 0;
  inset: 0;
}

.language-option span,
.level-option span,
.level-button {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-soft);
  color: var(--text);
  font-weight: 700;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease, box-shadow 140ms ease, color 140ms ease;
}

.language-option input:checked + span,
.level-option input:checked + span,
.level-button-active {
  background: linear-gradient(135deg, rgba(18, 106, 98, 0.14), rgba(18, 106, 98, 0.05));
  border-color: rgba(18, 106, 98, 0.35);
  color: var(--brand-strong);
  box-shadow: inset 0 0 0 1px rgba(18, 106, 98, 0.08);
}

.level-picker,
.level-toolbar {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.button {
  border: 0;
  border-radius: 18px;
  min-height: 56px;
  padding: 14px 18px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 140ms ease, filter 140ms ease, background 140ms ease;
}

.button-primary {
  background: linear-gradient(135deg, var(--brand), #1a8f85);
  color: #ffffff;
  box-shadow: 0 16px 28px rgba(18, 106, 98, 0.24);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.74);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
}

.button-full {
  width: 100%;
}

.topbar {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 16px;
}

.topbar-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.question-layout {
  display: grid;
  gap: 14px;
}

.question-card,
.controls-card {
  padding: 20px;
}

.question-card {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top right, rgba(255, 143, 61, 0.14), transparent 26%),
    linear-gradient(180deg, var(--panel-strong), rgba(255, 255, 255, 0.84));
}

.question-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.question-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #ffb36f);
  box-shadow: 0 0 0 8px rgba(255, 143, 61, 0.12);
  flex: 0 0 auto;
}

.question-text {
  margin: 16px 0 0;
  font-family: "Georgia", "Times New Roman", serif;
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.translation-card {
  margin-top: 24px;
  padding: 16px;
  border-radius: 20px;
  background: rgba(246, 249, 252, 0.88);
  border: 1px solid var(--line);
}

.translation-text {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
}

.controls-card {
  position: sticky;
  bottom: 12px;
  align-self: end;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(248, 251, 255, 0.86));
}

.level-button {
  cursor: pointer;
}

.button:hover,
.level-button:hover,
.language-option span:hover,
.level-option span:hover {
  transform: translateY(-1px);
}

.button-primary:hover {
  filter: brightness(1.03);
}

.button:focus-visible,
.level-button:focus-visible,
.language-option input:focus-visible + span,
.level-option input:focus-visible + span {
  outline: 3px solid rgba(18, 106, 98, 0.18);
  outline-offset: 3px;
}

@media (max-width: 719px) {
  .controls-card {
    position: sticky;
    bottom: 10px;
    box-shadow: 0 18px 36px rgba(19, 34, 56, 0.14);
  }
}

@media (min-width: 720px) {
  .shell {
    padding: 30px 28px 40px;
  }

  .hero {
    padding-bottom: 28px;
  }

  .panel {
    padding: 24px;
  }

  .topbar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .question-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .question-card,
  .controls-card {
    padding: 24px;
  }

  .language-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}